Home / 5,178.13-7,145.87-2,820.29

Finding the Fourth Proportional to 5,178.13, 7,145.87 and 2,820.29

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Solution

The fourth proportional to 5,178.13, 7,145.87 and 2,820.29 is: 3,892.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.13 : 7,145.87 = 2,820.29 : x
  2. Step 2: Convert to fraction form
    5,178.13/7,145.87 = 2,820.29/x
  3. Step 3: Cross multiply
    5,178.13x = 7,145.87 × 2,820.29
  4. Step 4: Simplify right side
    5,178.13x = 20,153,375.87
  5. Step 5: Solve for x
    x = 20,153,375.87/5,178.13
  6. Step 6: Final answer
    x = 3,892.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.